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	strlcpy.c - smdev - suckless mdev
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	strlcpy.c (1508B)
	---
	1 /*
	2 * Copyright (c) 1998 Todd C. Miller <[email protected]>
	3 *
	4 * Permission to use, copy, modify, and distribute this software for any
	5 * purpose with or without fee is hereby granted, provided that the above
	6 * copyright notice and this permission notice appear in all copies.
	7 *
	8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANT…
	9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE F…
	11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
	13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT …
	14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
	15 */
	16
	17 #include <sys/types.h>
	18 #include <string.h>
	19 #include "../util.h"
	20
	21 /*
	22 * Copy src to string dst of size siz. At most siz-1 characters
	23 * will be copied. Always NUL terminates (unless siz == 0).
	24 * Returns strlen(src); if retval >= siz, truncation occurred.
	25 */
	26 size_t
	27 strlcpy(char dst, const char src, size_t siz)
	28 {
	29 char *d = dst;
	30 const char *s = src;
	31 size_t n = siz;
	32 /* Copy as many bytes as will fit */
	33 if (n != 0) {
	34 while (--n != 0) {
	35 if ((d++ = s++) == '\0')
	36 break;
	37 }
	38 }
	39 /* Not enough room in dst, add NUL and traverse rest of src */
	40 if (n == 0) {
	41 if (siz != 0)
	42 d = '\0'; / NUL-terminate dst */
	43 while (*s++)
	44 ;
	45 }
	46 return(s - src - 1); /* count does not include NUL */
	47 }